65172379 has 2 divisors, whose sum is σ = 65172380. Its totient is φ = 65172378.

The previous prime is 65172377. The next prime is 65172383. The reversal of 65172379 is 97327156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65172379 - 2¹ = 65172377 is a prime.

Together with 65172377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65172377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32586189 + 32586190.

It is an arithmetic number, because the mean of its divisors is an integer number (32586190).

Almost surely, 2^65172379 is an apocalyptic number.

65172379 is a deficient number, since it is larger than the sum of its proper divisors (1).

65172379 is an equidigital number, since it uses as much as digits as its factorization.

65172379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 40.

The square root of 65172379 is about 8072.9411616833. The cubic root of 65172379 is about 402.4276922178.

The spelling of 65172379 in words is "sixty-five million, one hundred seventy-two thousand, three hundred seventy-nine".